A method of forming a bi-injected closure, comprising the steps of: forming a cap with a top plate and a depending sidewall, in a first injection moulding phase using a first mould part, the cap formed so as to include one or more external sealing areas; changing the first mould part for a second mould part, the second mould part sealing against the or each sealing area on the cap; and forming an outer ring around the cap sidewall whilst the second mould part is sealed against the sealing area/s in a second moulding phase.

A liquid container includes a container portion and a lid. The container portion includes a plurality of storage portions separated by at least one partition rib and storing liquid respectively in an isolated state. The lid bonded with the container portion so as to cover an opening region of the container portion. A plurality of project portions engaging with the partition rib so as to sandwich the partition rib from both sides of the partition rib is integrally molded with the lid. In a state in which the partition rib is engaged with the project portions, a bonding portion is filled with bonding resin so as to seal a cavity between an edge end of the partition rib and the lid and a cavity between an edge end of an outer circumference of the container portion and the lid.

A process for making an object from plastic material includes the following operations: moulding at least one insert, injecting a first plastic material into a first moulding cast, such first cast being configured so that the at least one insert includes a base from which exposure reliefs extend, intended to be visible when the object made of plastic material is finished, between the exposure reliefs passage channels being defined for a second plastic material in a subsequent overmoulding operation; positioning the insert in a second moulding cast, so that the insert is positioned with the base pressed against a first surface of a first half-mould of the second cast, and with the exposure reliefs pressed against an opposite second surface of a second half-mould; overmoulding a second plastic material on a part of the insert, injecting the second plastic material into the second cast, so that the second plastic material injected fills the second cast passing through the passage channels defined between the exposure reliefs of the insert, covering the base and being interposed between the exposure reliefs.

A process for producing molded products having portions formed with two separate materials is provided. The process involves forming a first component over a structural core in a first step, and forming a second component that is secured to the first component and the core in a second step. The second component can be formed directly over the first component or can be secured thereto after formation. The first and second components can additionally be formed with indicia thereon, or with recesses within which inserts containing the desired indicia can be positioned. Additionally, the first component can be formed with a ridge disposed on a projection formed on the first component that effectively seals off a portion of the first component when the second component is formed around the core and the first component to ensure the portion of the first component surrounded by the ridge remains visible after formation of the second component.

A process for producing molded products having portions formed with two separate materials is provided. The process involves forming a first component over a structural core in a first step, and forming a second component that is secured to the first component and the core in a second step. The second component can be formed directly over the first component or can be secured thereto after formation. The first and second components can additionally be formed with indicia thereon, or with recesses within which inserts containing the desired indicia can be positioned. Additionally, the first component can be formed with a ridge disposed on a projection formed on the first component that effectively seals off a portion of the first component when the second component is formed around the core and the first component to ensure the portion of the first component surrounded by the ridge remains visible after formation of the second component.

A process for producing molded products having portions formed with two separate materials is provided. The process involves forming a first component over a structural core in a first step, and forming a second component that is secured to the first component and the core in a second step. The second component can be formed directly over the first component or can be secured thereto after formation. The first and second components can additionally be formed with indicia thereon, or with recesses within which inserts containing the desired indicia can be positioned. Additionally, the first component can be formed with a ridge disposed on a projection formed on the first component that effectively seals off a portion of the first component when the second component is formed around the core and the first component to ensure the portion of the first component surrounded by the ridge remains visible after formation of the second component.

A first resin layer (1) has: a covered region which is covered by a second resin layer (2) and an exposed region (1a); a contact part (1b) which is provided in the exposed region (1a); and a bend part (1c) which is provided between (a) a boundary between the covered region and the exposed region (1a) and (b) the contact part (1b).

A process for producing molded products having portions formed with two separate materials is provided. The process involves forming a first component over a structural core in a first step, and forming a second component that is secured to the first component and the core in a second step. The second component can be formed directly over the first component or can be secured thereto after formation. The first and second components can additionally be formed with indicia thereon, or with recesses within which inserts containing the desired indicia can be positioned. Additionally, the first component can be formed with a ridge disposed on a projection formed on the first component that effectively seals off a portion of the first component when the second component is formed around the core and the first component to ensure the portion of the first component surrounded by the ridge remains visible after formation of the second component.

A method of forming a bi-injected closure, comprising the steps of: forming a cap with a top plate and a depending sidewall, in a first injection moulding phase using a first mould part, the cap formed so as to include one or more external sealing areas; changing the first mould part for a second mould part, the second mould part sealing against the or each sealing area on the cap; and forming an outer ring around the cap sidewall whilst the second mould part is sealed against the sealing area/s in a second moulding phase.

A process for making an object from plastic material includes the following operations: moulding at least one insert, injecting a first plastic material into a first moulding cast, such first cast being configured so that the at least one insert includes a base from which exposure reliefs extend, intended to be visible when the object made of plastic material is finished, between the exposure reliefs passage channels being defined for a second plastic material in a subsequent overmoulding operation; positioning the insert in a second moulding cast, so that the insert is positioned with the base pressed against a first surface of a first half-mould of the second cast, and with the exposure reliefs pressed against an opposite second surface of a second half-mould; overmoulding a second plastic material on a part of the insert, injecting the second plastic material into the second cast, so that the second plastic material injected fills the second cast passing through the passage channels defined between the exposure reliefs of the insert, covering the base and being interposed between the exposure reliefs.